Vaccine from MEAN ANTIBODY TITRE IN NTU VALUES  
1 2 3 4 5 6 7 Mean ±SEM
Control 5.006 11.704 7.067 12.440 7.582 3.828 11.557 8.455 ± 1.309
Enugu/Ebonyi 17.740 18.476 20.169 24.807 23.629 17.740 20.611 20.453 ± 1.072
Imo State 20.979 24.660 20.022 19.065 24.660 23.114 17.740 21.463 ±1.036
Anambra 17.814 18.255 19.654 21.494 17.740 21.273 21.200 19.633 ±0.644
Abia 20.169 25.985 18.550 17.667 18.108 18.623 20.169 19.896 ±1.078
Note: Control was the DPT stored at 37°C for 12 months
Calculated Antibody Titer (in “Nephelometric Turbidity Unit” (NTU)) = Sample (mean) absorbance Value x 10/Cut-off
Table 2: Pertussis IgG Antibody quantification in immunized Mice.